button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    margin: 4px 2px;
    cursor: pointer;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}
button:hover {
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24),0 17px 50px 0 rgba(0,0,0,0.19);
}

#textShowId {
     /*去掉右下角的斜杠，不允许文本框缩放*/
     resize: none;
     background: #e6dfdf;
     /*设置字体大小*/
     font-size: 18px;
     /* placeholder位置 提示靠左靠右居中等 */
     text-align: left;
     box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

h1 {
    font-size: 40px;
    color:red;
}

div {
    text-align: center;   /* 居中 */
}

input {
        height: 35px;
        background-color: rgb(248, 240, 240);
        font-size: 16px;
        border: 1px solid rgb(27, 26, 26);
        color: black;
        outline: none;  
        padding-left: 15px;  
        box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);
}

#nick {
    width: 60px;
}